Hatch-coaming



(No Model.)

A. MQDOUGALLQ HATCH OOAMINGS.

Patented May 19, 1896.

ANDREW E.GRM(AM. PHOTOLITNQWASMINGTDN. D,C.

NITED STATES PATENT OFFICE,

ALEXANDER MCDOUGALL, OF IVEST SUPERIOR, \VISCONSIN.

HATCH-COAMING.

SPECIFICATION forming part of Letters Patent No. 560,362, dated May 19, 1896. Application filed July 16, 1894. $eria1ll'o. 517,723. (No model.)

To all whom it may concern:

Be it known that I, ALEXANDER MoDoU- GALL, a citizen of the United States, residing at WVest Superior, in the county of Douglas and State of lVisconsin, have invented certain new and useful Improvements in Hatch- Ooamings; and I do hereby declare the following to be a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to various new and useful improvements in hatch-coamin gs, such improvements being especially adapted for application with the novel type of vessels invented by me and which are now commonly known as whalebacks. What I propose to do is to provide a hatch-coaming for such vessels extending, preferably, almost the e11- tire length thereof and having hatches arranged at appropriate distances thereon the spaces between such hatches being occupied by short elevated decks. The hatches which are thus made use of will be capable of being handled with as much facility as when no coaming is used, as in the case of the whaleback vessels referred to, and by the new arrangement which I shall claim hereinafter several important and desirable ends are attained, as will be presently described.

For a better comprehension of these improvements attention is directed to them:- companying drawings, forming part of this specification, and in which Figure 1 is a cross-sectional View of a whaleback vessel embodying the present improvements. view of aportion of the hatch-coaming, hatch, and other parts and Fig. 3, a longitudinal sectional view on the same scale as Fig. 2, showing one of the thwartship-plates, hatchcoaming, hatch, and other parts.

In all of the above views correspondent parts are designated by the same letters of reference.

Although I have illustrated and shall hereinafter'describe my present improvements in connection with a whaleback vessel, it is to be understood that such improvements are applicable to other varieties of'vessels.

Fig. 2 is an enlarged cross-sectional A is the outer plating of the vessel, such plating being riveted or otherwise secured to continuous frames B.

lleretofore when the hatch covers have been bolted directly to the deck these frames have been generally cut away at the hatches to enable the vessel to be loaded with greater facility; but with the present improvements these frames may be extended directly across the hatches without interfering with the loading of the vessel, and particularly when cargoes in bulk, such as ore and grain, are being loaded.

C are cross-beams which are generally used to support the arched decks of whaleback vessels.

D D are upright stanchions, which further support the deck and which are arranged in two rows, one on each side of the line of the hatches. These stanchions maybe supported either on the false bottom E of the vessel or on the bottom frames thereof. Heretofore these stanchions have extended only as far as the deck of the vessel; butin the present case I extend them as far above the deck as may be desired for the proper height of the hatchcoamin g. The stanchions D are formed, preferably, of angle-irons and may be riveted to the frames B at the points of intersection.

F is a continuous plate or plates riveted to the upper portion of each stanchion D and extending from the bow to the stern of the vessel, or for so much of the length thereof as may be desired. The said plates F extend a short distance above the stanchions D and a short distance beneath the deck A, as shown in Fig. 2.

G is an. angle-iron which is riveted to the plates F and the deck A and which extends the entire length of said plates. This angleiron tends to greatly strengthen the joint between these parts and effectively prevents leakage.

H is an angle-iron which is riveted to the outside of the plates F at the top thereof, and I is a lin er-iron riveted to the said angle-irons II. On the inside of the plates F, directly opposite the angle irons H, is riveted an angleiron J, the position of the latter angle-iron being reversed to that of the angle-iron H.

The angle-iron J rests immediately on the top of the stanchions D, thereby contributin g materially to the strength of the deck.

K is apiece of hard wood which is secured between the flanges of the angle-iron J and which is curved or rounded on its outer side. This wood not only contributes to the strength of the coaming, but offers a smooth and easy entrance into the hatch and prevents grainspouts and loading-buckets, (be. from becoming damaged by contact with the metallic sides of the coaming.

L, Fig. 3, is a plate which forms the front and rear of the hatches, extendingfrom one coaming to the other and of the same width as the plates F. Said plates may, however, be dispensed with. These plates L are riveted at their lower ends to the continuous frames 13 and at their upper ends are provided with an angle-iron M.

N is an elevated deck which is riveted to the an gle-irons M and H between the hatches. The said deck N is composed of plates, which preferably extend across from side to side,

and of the same thickness as the liner-irons 1,.

so that the hatches 0 will rest at their sides on said liner-irons and at their ends on said elevated decks N. So far as the construction of said hatches O is concerned I make no claim herein to the same, since they are described in prior patents granted to me. I prefer, however, to make them of a single plate, provided with a rubber packing P, extending all around and held in place by plates Q.

The hatches are to be secured in position by bolts R, which at the sides pass through hll6ll1161ll0l1$ I and angle-irons H and at the ends pass through the elevated decks N and angle irons M. By this arrangement the bolt-holes of the bolts R will be outside of the packing P, and all danger of leakage is therefore overcome. The hatches 0 may be moved forward or aft to disclose the hatehways in any desirable manner, but preferably by means of small rollers, the shanks of which engage in the bolt-holes, said rollers traveling on the liner-irons I.

The advantages of the particular construction of hatch-coamings above described will be readily comprehended.

The plates F, extending fore and aft and reinforced by the angle-irons G, II, and J, will greatly increase the longitudinal strength of the vessel, and particularly on the deck thereof, which, being cut up by the hatches, is now a common source of weakness. The stanchions D, bearing under the angle-irons J, which connect with the main-deck by the plates'F and angle-irons G, will offer a better support for the deck than when riveted only to the frames B. By providingcoamings having an appreciable height cargoes can be loaded entirely up to the hatches, and the capacity of the vessel will thereby be increased. The hatches being elevated above the deck there will be less liability of water entering the same than when flush hatches are used and in the event of insuflicient and unsatisfactory packing, and, finally, when at sea the decks N and hatches 0 will constitute an elevated walk on which the officers and crew may pass in safety from one end of the vessel to the other.

Having now described my invention, what 1 I claim, and desire to secure by Letters Patent, is as follows:

1. The combination with a vessel having vertical stanchions arranged on each side of 5 the line of the hatches and extending above the main deck, of vertical hatch-coamings secured to said stanchions above the maindeck, and removable hatch-covers adapted to be bolted to said hateh-coamings, substantially as set forth.

2. The combination with a vessel having vertical stanchions arranged on each side of the line of the hatches and extending above the main-deck, of vertical hatch-coamings secured to said stanchions above the maindeck, elevated decks mounted on said hatchcoamings with spaces between them, and removable hatch-covers adapted to be bolted to said hatch-coamings between said elevated decks, substantially as set forth.

3. The combination with a vessel having vertical stanchions D, arranged on each side of the line of the hatches and extending above the main-deck, of vertical plates F, F secured to said stanchions above the main-deck, angle-irons G, G at the joint of said plates and the main-deck, angle-irons H, at the upper edge of said plates, and removable hatchcovers 0 adapted to be bolted to said angle irons I'I, substantially as set forth.

4:- The combination with a vessel having vertical stanchions D, arranged on each side of the line of the hatches and extending above the m ain-deck, of vertical plates F, F secured to said stanchions above the main-deck, angle-irons G, G at the joint of said plates and the main-deck, angle-irons II, at the upper edge of said plates, angle-irons J, on the inside of said plates, and bearing on the upper ends of the stanchions D and removable hatch-covers 0, adapted to be bolted to said angle-irons 11, substantially as set forth.

5. The combination with a vessel having vertical stanchions D, arranged on each side of the line of the hatches and extending above the main-deck, of vertical plates F, F, secured to said stanchions above the main-deck, angle-irons G, G, at the joint of said plates and the main-deck, angle-irons II at the upper edge of said plates, angle-irons J, on the inside of said plates, and bearing on the upper ends of the stanchions D, wooden pieces K secured within said angle-irons J, and removable hatch-covers 0, adapted to be bolted to said angle-irons II, substantially as set forth.

0. The combination with a vessel having vertical stanchions D, arranged on each side of the line of the hatches and extending above the main-deck, of vertical plates F, F secured to said stanohions above the main-deck, angle-irons H, at the upper edge of said plates, liner-irons I on said angle-irons H, plates L, at the front and rear of the hatches, angleirons M at the upper edge of said plates L, elevated decks N secured to said angle-irons H and M, and removable hatches adapted to be bolted at their edges to the elevated decks N and liner-irons I, substantially as set forth. IO

In testimony whereof I affix my signature in presence of two Witnesses.

ALEXANDER MODOUGALL. \Vitnesses:

WM. A. THOMPSON, J12, CHAS. W. LELAND. 

